package cnki.kg.demo.hadoop.wordcount;

import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Mapper;

import java.io.IOException;

public class WordCountMapper extends Mapper<LongWritable, Text,Text, IntWritable> {
    Text k=new Text();
    IntWritable v=new IntWritable(1);
    @Override
    protected  void  map(LongWritable key,Text value,Context context) throws IOException, InterruptedException {
        String line=value.toString();
        String[] words=line.split(" ");
        for (String word : words) {
            k.set(word);
            context.write(k,v);
        }

    }
}
